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| Hauptseite > Workflowsammlungen > Öffentliche Einträge > Production of K^{+}K^{−} pairs in proton-proton collisions below the ϕ meson threshold |
| Hauptseite > Workflowsammlungen > Öffentliche Einträge > Production of K^{+}K^{−} pairs in proton-proton collisions below the ϕ meson threshold |
| Journal Article | FZJ-2013-04279 |
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2013
Inst.
Woodbury, NY
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Please use a persistent id in citations: http://hdl.handle.net/2128/5397 doi:10.1103/PhysRevC.87.065203
Abstract: The pp -> ppK+K- reaction was measured below the phi threshold at a beam energy of 2.568 GeV using the COSY-ANKE magnetic spectrometer. By assuming that the four-body phase space is distorted only by the product of two-body final state interactions, fits to a variety of one-dimensional distributions permit the evaluation of differential and total cross sections. The shapes of the distributions in the Kp and Kpp invariant masses are reproduced only if the K-p interaction is even stronger than that found at higher energy. The cusp effect in the K+K- distribution at the K0K0bar threshold is much more clear and some evidence is also found for coupling between the K-p and K0bar n channels. However, the energy dependence of the total cross section cannot be reproduced by considering only a simple product of such pair-wise final state interactions.
Keyword(s): channel cross section: energy dependence ; K- p: scattering length ; K: pair production ; threshold ; p p: exclusive reaction ; final-state interaction ; cusp effect ; ANKE ; K+ K-: mass spectrum ; mass spectrum: (2p K-) ; Lambda(1405) ; Juelich COSY PS ; experimental results ; p p --> 2p K+ K- ; 2.568 GeV-kin
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